Secure SMTP with TLS, DNSSEC and TLSA records.

Document Type Replaced Internet-Draft (individual)
Author Tony Finch 
Last updated 2013-02-20 (latest revision 2012-06-27)
Replaced by draft-ietf-dane-smtp
Stream (None)
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Expired & archived
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Stream Stream state (No stream defined)
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IESG IESG state Replaced by draft-ietf-dane-smtp
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


SMTP has a STARTTLS extension, but (especially in the case of inter- domain mail transfer) it only provides very limited security because it does not specify how to authenticate the server's certificate. This memo specifies how TLSA records in the DNS can be used for proper SMTP server authentication.


Tony Finch (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)